As Lyndon Johnson told it -- or allowed it to be told in his name -- this Goldwater guy, if given half a chance, would blow up the world. In which case, why shouldn't the voters back in '64 not play it safe and keep LBJ in the White House? Memories of the infamous Johnson television spot, with its daisy-leaf-plucking-about-to-be-incinerated-by-bad-Barry, cuddly, little girl, cause some of us old-timers to reach for the Maalox. (Small wonder that Barry would later say, talking of Lyndon, "Don't get me started on that SOB.") The debasement of presidential discourse wasn't the only public offense...